getParentFragment() was introduced in API level 17 (Android 4.2). Android 4.2 introduced the idea of nested fragments (fragments containing other fragments). Calling this results in null if the fragment has a parent which is an Activity. Have a look at this. If you are using support library then you can use getParent(), may be you … Read more
override canScroll in the parent ViewPager: @Override protected boolean canScroll(View v, boolean checkV, int dx, int x, int y) { if(v != this && v instanceof ViewPager) { return true; } return super.canScroll(v, checkV, dx, x, y); }
This solution may be better version of @Sean answer: @Override public void onBackPressed() { // if there is a fragment and the back stack of this fragment is not empty, // then emulate ‘onBackPressed’ behaviour, because in default, it is not working FragmentManager fm = getSupportFragmentManager(); for (Fragment frag : fm.getFragments()) { if (frag.isVisible()) { … Read more
So there seem to be a lot of different workarounds for this, but based on @Jayd16’s answer, I think I’ve found a pretty solid catch-all solution that still allows for custom transition animations on child fragments, and doesn’t require doing a bitmap cache of the layout. Have a BaseFragment class that extends Fragment, and make … Read more
Starting in Android 4.2, there are nested fragments.http://developer.android.com/about/versions/android-4.2.html#NestedFragments The support library now also includes support for this for older Android versions. So you can do something like this: @Override public void onViewCreated(View view, Bundle savedInstanceState) { super.onViewCreated(view, savedInstanceState); ViewPager mViewPager = (ViewPager) view.findViewById(R.id.viewPager); mViewPager.setAdapter(new MyAdapter(getChildFragmentManager())); } Full implementation available here: https://github.com/marcoRS/nested-fragments/tree/master/src/com/burnside/digital/nestedfragments
The best way is use an interface: Declare an interface in the nest fragment // Container Activity or Fragment must implement this interface public interface OnPlayerSelectionSetListener { public void onPlayerSelectionSet(List<Player> players_ist); } Attach the interface to parent fragment // In the child fragment. public void onAttachToParentFragment(Fragment fragment) { try { mOnPlayerSelectionSetListener = (OnPlayerSelectionSetListener)fragment; } catch … Read more
I had the same issue. Changing the parent class of my PageAdapter from android.support.v4.app.FragmentPagerAdapter to android.support.v4.app.FragmentStatePagerAdapter solve my ViewPager display issue on “second time”!
I solved this problem with the following code (support library is used): In container fragment override onActivityResult in this way: @Override public void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); List<Fragment> fragments = getChildFragmentManager().getFragments(); if (fragments != null) { for (Fragment fragment : fragments) { fragment.onActivityResult(requestCode, resultCode, data); } } } Now … Read more
Finally! the android 4.2 update comes with default support for nested fragments, also compatible: Official NestedFragments. What’s more, the support of the nested Fragments in announced in the latest 11th revision of the v4 support library!
Limitations So nesting fragments inside another fragment is not possible with xml regardless of which version of FragmentManager you use. So you have to add fragments via code, this might seem like a problem, but in the long run makes your layouts superflexible. So nesting without using getChildFragmentManger? The essence behind childFragmentManager is that it … Read more